What: Interactive, online presentations on hydrology topics
Recently, we requested a series of hydrology workshops under NOAA's Junior Hydrologist Program - the topics we selected were Water Cycle, River Transportation, Flooding and Hydro Hot Seat.
Each session was an hour, and a professional hydrologist from NOAA did each presentation. The best part (in our view) of these presentations was the ability to ask a professional our questions - they did a great job pulling out key ideas in their presentation, and adding on examples from their work. Our students were also exposed to geography concepts across the US - we had hydrologists from the Midwest and Southeast, and the challenges in each area are different.
Our final workshop was the Hydro Hot Seat presentation - where we would learn about the science of river forecasting, and predict if/when there would be a flood. During this presentation, we were given data (e.g. from radar readings), and students volunteered to explain their reasoning as to which model would best fit the scenario. Our presenter was impressed by the stream of students eager to explain their work, and chuckled that we have a batch of hydrologists ready to go!
We are thankful to NOAA and NWS for making this opportunity freely available, and recommend it to other homeschooling groups. It was easy to schedule the workshops (request online via the link above), and this is a great supplement for earth and general science
As we prepare for Passion Week, we would like to share some resources that HEART members have recommended.
Devotionals
Lithos Kids is offering their 2026 Easter Guide for free. You will need the Kingdom of God Bible Storybook - New Testament, but they have the audiobook version available for free on their website as well. A couple other audiobooks can also be downloaded for free. We love their Little Pilgrim’s Big Journey and their Bible storybooks.
Holy Week
Hamilton Square Church in San Francisco will host special services from Monday to Friday at 7pm.
Today, we collaborated again with Together We AI to host webinars on AI.
The first webinar was on Python, where we learned machine learning as well as beginning Python syntax, before writing a simple number guessing game. For students interested in learning more about Python, our presenter recommends Codecademy - free and paid tutorials are available.
In a second session, we learned about neural networks, the concepts behind computer vision. At the end of the session, students trained an image classifier without learning code.
A nice thing about Teachable Machine, the site used in today's webinar, is that it does not upload any of the samples/training data - everything is kept in browser, and nothing is saved. That is good to know if your student wants to train some models for personal projects. For students wanting to go further and code using the models they trained, the presenter recommended CoLab.
We want to thank Together We AI for continuing to expand AI education freely, including to our homeschooling group. We encourage those interested to follow Together We AI - they post about new webinars on their site, and they are also working on an AI curriculum which can be accessed after filling in this form.
Who : Grades K-12 (although it will be easier if ages are close together). Max 34 students.
Cost : $250/class, as of Jan 2026
Note: The parking may be confusing - to get to the visitor center, we had to drive down a road that was marked "authorized vehicles only".
We booked this field trip at the beginning of the school year, when the Farallones Visitor Center had just re-opened. At the time of booking, it was recommended to reserve a spring trip (January or later) if our group would include younger students (2nd grade and below).
The docents were very responsive, and when we inquired about a mixed age group like ours, were quick to suggest a combination of activities which were all a hit.
a squid dissection, and an exploration of the beach. At the last minute, they added plankton viewing through the microscope, which was a wonderful bonus.
Looking at plankton: Students plankton through their microscope and learned about phytoplankton and zooplankton.One student was overjoyed to learn what she had always suspected: that a little creature lives in a sand dollar.
Squid dissection was also amazing! Students took out the squids' beaks, hearts and ink sacs. They learned how to distinguish between male and female squid. They also wrote using the squid pen and its ink. One especially memorable fact was how a squid squirt ink at its enemies to evade its enemies.
Bird watching at the beach, the group learned about sea gulls' migration pattern in the Bay Area (including loving to eat KFC!). They even got to see a red-footed booby and surf scoter duck!
In the words of a group member, "I've been to many field trips, this is by far the best one, with great materials presented to the students, hands on exploration on plankton & squid dissection, and an amazing view of the ocean & Golden Gate bridge!"
This was a hidden gem - we found out that San Mateo County Parks hosts free online lessons on a variety of topics, and requested them to teach one on Food Webs. We scheduled a couple of months in advance - that gave us enough time to gather a group, and work out logistics (e.g. if families wanted to meet at the library to do the class together). A bonus we were not expecting: the lesson includes an owl pellet dissection along with a worksheet, and these were provided for free - the ranger dropped them off a week before.
On the day of the lesson, we logged on to the Zoom link. Ranger Lauren started off with a question, "Why do we eat?" and that got a lot of chatter. She then moved us to the idea of food as energy, and introduced food chains and food webs.
She also introduced terms like producer, consumer and decomposer, as well as herbivore, carnivore and omnivore. We appreciated that the slides used pictures of local animals, e.g. the Mission Blue Butterfly, which helped us appreciate the diversity of wildlife in our area. The first half of the worksheet came in handy - we drew various food chains and connected them into a food web.
We then talked about owls - how they don't have teeth, but prey is swallowed whole and the parts which cannot be digested (e.g. bones, feathers) are regurgitated into a package (the "owl pellet"). The pellets we used are sanitized, and can be handled safely. The ranger showed us this video of an owl regurgitating:
After that, it was time for the hands-on activity. Students were eager to take apart the owl pellet (tip: use fingers to gently separate the pellet, tools might break the parts within) and for 10+ minutes worked with intense focus.
The lesson ended with a Q&A, and one of the students had a question which ranger Lauren couldn't answer on the spot, but to her credit, she sent out an email the next day with the answer.
Q: Are owls the only birds which regurgitate pellets?
A: It turns out many bird species regurgitate pellets! Some are found more frequently because they are denser/sturdier in structure such as owl pellets or pellets from raven or birds of prey (such a hawk or a peregrine). If they google bird pellet they will find MANY types of birds that regurgitate pellets.
We are thankful to San Mateo County Parks for hosting this lesson, and for giving us a renewed appreciation of the complexity of nature around us!
Psalm 24:1 The earth is the Lord’s and the fullness thereof, the world and those who dwell therein.
Who : High school. Small group, ~10 people including parents and students
Cost : Free
Note: Allow extra time to find parking (street or nearby garages), as well as time to pass security screening.
The San Mateo County Court's proceedings are generally open to the public, with some exceptions such as juvenile court, conservator ship. They also offer an educational outreach program, which is what we reserved - this would consist of an observation period, plus a meet and greet with a judge. They requested a small group size, which allowed us to observe proceedings without causing disruption. asked
(Note: Photos and recording are not allowed within the courthouse hence this write-up is text-only).
We arrived at the San Mateo County Superior Court around 8:30am, after having found street parking. We had been advised to allocate extra time for security screening - indeed, there was a line of people outside the entrance. However, the screening went smoothly and we met our coordinator.
The coordinator led us to one of the courtrooms where we were instructed to enter quietly and sit in the observation area without interacting with anyone else. The court was already in session, with a judge in the center, lawyers in the front row, and a side door through which plaintiffs were led in. It took some figuring out what was going on in each case, and many cases were deferred. However, the solemnity of the situation was impressed on us - some of the plaintiffs led in wore orange or red jumpsuits, and security was high. We also observed courtroom recorders and interpreters.
After an hour, we were led to another courtroom which had a different seating arrangement - jury instead of judge, but was currently unused. There, we spoke with a judge and had the opportunity to ask questions. Some questions from our group:
Q: Do you get therapy for the distressing cases you hear?
A: Not for most judges, there is no mandate.
Q:What are some major changes you have seen over the years?
A: We see more cases of mental distress now.
After the meet and greet with the judge, we thanked the judge and coordinator for their time. This field trip was a worthwhile peek into the judicial system, and strengthened our civic understanding.
Psalm 106:3 Blessed are they who observe justice, who do righteousness at all times!
Reason #1,982,963 that we feel blessed to homeschool in the Bay Area - how often do you get to meet neuroscientists? And how many of them would jump at the chance to teach a K-12 class? We met Drs. Aarron and Natalia when they did a popup event in Foster City introducing BioCompass Kids, their project to introduce science to children in an accessible yet rigorous way. They agreed to run a 4 hour neuroscience class for our middle and high schoolers.
When we arrived, they had set out a variety of stations with colorful materials such as those pictured above, and we immediately knew this would be a fun class with hands-on opportunities. They started with an analogy - the brain is like the internet, with grey matter being the nodes/computers and the white matter being the connections between them.
(Note about photos below: Our class was held on Halloween so our instructors were dressed as mad scientists😀)
Pointing out grey vs white matter
Starting from macrostructures, we learned about main lobes of the cerebrum: frontal, parietal, temporal, occipital. Each has functions, e.g. the frontal lobe controls decision making, the occipital controls visual input. The instructors then distributed some cards with problem scenarios, and asked students to match them to the lobe the problem might lie, e.g. "You can't remember your friends' names (temporal lobe - memory)". Some were hard - "You try to catch a fast moving ball but fail".. is it frontal (movement), occipital (vision), or something else? Hint: look up proprioception.
Game board for matching lobes to functions
Even though the cerebrum has defined lobes and functions, one cannot just study a single region because brain cells are interconnected and can rewire themselves (neuroplasticity). For example, a stroke patient may be unable to speak, but with therapy the brain can wire new connections to undamaged areas so the person can relearn speech. To understand the process better, our focus switched to brain cells (neurons).
Neurons can vary in size and shape, but have parts in common: cell body, axon (output), and dendrites (input). Dr. Aarron showed us cells using their digital microscope - we were delighted to learn it was homemade using OpenFlexure's microscope model. We also passed around slides, and he described how scientists prepare samples for labs using tools to make thin (40 micron) slices and dying them with H&E to color the nucleus purple and cell body pink.
It was time for a dissection demo! Dr. Natalia brought out sheep brain samples which had been preserved in formalin. Students could choose to handle the samples - those who did donned PPE (plastic coat, gloves).
Before cutting, she pointed out the protective membrane (meninges) - when those were removed, we could see the folds that increase the surface area for grey matter cells. It was fascinating to compare the number of folds for a sheep brain compared to a mouse's brain which was smooth - animals have different folds, depending on complexity. Also, both sheep and mice brains have comparatively large olfactory bulbs (nerves connecting from nose to brain)
Moving on, we learned about the connection between neurons. Information from one neuron's axon flows to another neuron's dendrites, but neurons aren't directly wired to each other. If all neurons were wired together and firing, that would actually cause a seizure. Instead, chemical neurotransmission occurs via:
Neurotransmitters drift across to the dendrite which converts the chemical signals to electrical. When received, ions from the brain flow into the neuron so the neuron builds up charge and fires a signal to the next neuron
Neurotransmission is fast, about 20 milliseconds, but some neurons can send information faster because of myelin. To illustrate these, students were asked to run a relay race to pass a "secret" to another team member, with and without myelin.
Running with myelin "booster"
The next activity demonstrated how neurotransmitters are cleared from the synapses by astrocytes. If this were not done, the remaining chemicals would interfere with neurons' receiving new messages.
What a mess!
Finally, students learned about inhibitory neurons - without them the brain would have a hard time distinguishing between a signal and noise from other neurons. The instructors brought a LED game to illustrate this principle - teams had fun challenging each other to stop the noise.
That wrapped up the session - students had a lot to tell their parents that evening, and we are thankful to Drs. Aarron and Natalia for sharing about the fascinating world of neuroscience!
Tips for other homeschoolers interested in organizing a class:
Drs. Aarron and Natalia can be reached through the BioCompass Kids website or Instagram. They are also planning for future classes with different topics.
Our class size was capped at 12 students - this was an ideal number for discussion/interaction
Plan for a large enough room (ideally with outdoor access) to accommodate all activities.
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